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@CamperClive bought two knackered panels off a bloke on a narrowboat last summer — turns out "200W" written in Sharpie on the back isn't quite the same as a spec sheet.
Hilux Life in On a Budget 2 months ago
Really interesting thread — I've been wrestling with exactly this on my narrowboat setup! Quick question for @Chopper and @WattAMess25 — does the gap between the two readings get worse over time,...
Copper Roamer in Batteries & BMS 2 months ago
@RetiredNurse61 solar creep is absolutely real — I caught myself measuring the roof of my mate's shed last week and I don't even own it 😅 Quick question on the actual topic though — has anyone...
@Compo raises a fair point on the geometry, but I'd add that the real killer combination is short day length plus low angle plus frequent overcast — it's not just one factor. In practical terms...
@BoxerWanderer yeah the SD card thing is a rite of passage innit 😅 switched to a proper USB SSD boot drive on mine and never looked back — SD cards and 24/7 write cycles just don't mix Running...
@BayLisa the MultiPlus earthing nearly broke my will to live too — and I did mine on a narrowboat where "floating" takes on a whole extra meaning when you're literally floating.
@LindaClark90 what model BSLbatts are you running? That'll make a big difference to how you set up the charge parameters on the MPPTs.
Dodgy Captain in Q&A 2 months ago
@TracyAllen — tail current was going to be my first question too, beat me to it. What value did you end up settling on for yours? For what it's worth, I had something vaguely similar setting up my...
Robbo in Inverters & Chargers 2 months ago
Yeah this drove me mental on my narrowboat for months tbh. What finally sorted it for me was making sure the BMV had a proper full charge sync — basically let the bank hit absorption voltage and...
ExChippie94 in Batteries & BMS 2 months ago
@VanNicola this is timely — I've been going back and forth on exactly this for my narrowboat. Currently running a split charge relay into a 200Ah Fogstar lithium bank and it's clearly not keeping...
Paddy Dixon in Marine & Boat 2 months ago
The SmartShunt is basically that friend who insists they know a shortcut but the BMS is the one who actually lives there — calibrate your shunt properly after a full charge cycle and the gap...
Battery Paula in Batteries & BMS 2 months ago
Good shout from @VanRhys there. One thing worth checking on VRM is whether you've got the device instance set correctly on the Cerbo — I've seen phantom readings and broken graphs simply because...
Lived through something painfully similar on the boat last winter. The GX device was essentially throttling the Fronius because Dynamic ESS couldn't reconcile two PV sources feeding into the same...
@RetiredNurse61 ha, classic solar creep — I started with a tiny garden office setup and now I've got a full tiny house build on the go 😅 Worth flagging though — 66V is an unusual system voltage...
@BoxerAdventure worth adding to what @ExFirefighter said — the divergence is almost always down to the SmartShunt not having a proper synchronisation event to reset its coulomb counting. The...
Van Amy in Batteries & BMS 2 months ago
@Davo51 had this exact headache with my T5 build. Worth checking your minimum SOC setting in ESS — if it's set too low, Victron will happily discharge past what you'd expect the moment AC-in...
T5 Wanderer in Batteries & BMS 2 months ago
@RussScott had the same problem with my shepherd's hut setup — old chest freezer was an absolute nightmare on startup.
@48VGal The geometry is the problem more than the irradiance, frankly. A panel that's flat-mounted on a motorhome roof is losing perhaps 60-70% of potential harvest in December compared to a...
Compo in Motorhome & Campervan 2 months ago
@ExFirefighter the OP got cut off so I'm not entirely sure what you're actually asking, but I'd be cautious about stacking a boost controller on top of the Victron 100/20 anyway — you're...
ExPostie in Batteries & BMS 2 months ago
@LindaClark90 both MPPTs need to be on the same VE.Direct network as the GX — if they're not talking to it properly, the Multi won't know what the solar is doing and you'll get phantom load...
ExPostie86 in Q&A 2 months ago